( 3 ) 

 Summary of Current Eesearches, &c. — continued. 



PAGE 



Ciliation of the llypotrichou8 Infusoria 636 



Species of Vorticellx 636 



Acinetidm 636 



New Type of Porcellanous Foraminifera 039 



Bacterium rubescens Lank. = Monas Okenii Ehr 640 



Oviform Psorospermise or Coccidia 643 



Botany. 



Development of the Embryo and Embryo-sac 643 



EmbryogenyoftheLeguminosx 044 



Development of the Ovule of Primula 647 



Homology of the Ovule 048 



Fhytobktsts and their Pseudopodia 04'. I 



Formation of Pollen-tubes 649 



Cause of the Movement of Pollen-tubes 650 



Apical Growth of the Roots of Phanerogams 050 



Pitchers of Disc'hidia Rafflesiana 651 



Influence of Light and Air on the Anatomical Structure of Plants .. . . 651 



Respiration of Plants 051 



Oa-aUtte of Lime in Plants 653 



Insects and the Cross-fertilization of Flowers C58 



Classification of Sphagnaceie 653 



Leucogaster, a New Genus of Hymenogastrex 654 



Parasites of the Human Ear 055 



Chromogenous Schizomycete on Cooked Meat 655 



Neic Bacterium sensitive to Light 656 



Connection of the Bacilli of Hay and of Distemper 057 



Diffusion of Bacteria 058 



Parasite of Malaria .. , 059 



Parasitic Character of Cases of Malaria.. . . 059 



Vaccinal Micrococci 061 



Mucorhii 061 



Disengagement of Oxygen by Vegetable Cells in the Microspectrum . . . . 661 



Disengagement of Oxygen by Hxmatococcus 603 



Hydrurus 664: 



Relationship of Palmella to the Confervacex 004 



Division of C'losterium intermedium 005 



Diatoms from the Island of Lewis 005 



Microscopy. 



Bausch and Lotnb Optical Co.'s Professional Microscope (Fig. 113) .. .. 666 



Bulloch's Newer Congress Stand (Figs. 114 and 115) 606 



Guilhmare's School Microscope (Fig. 116) 069 



Gundlach's College Microscope (Fig. 117) 670 



Martens' Ball-jointed Microscope (Fig. 118) 072 



Polarizing Microscopes 072 



Sch-ieck's Microscope '.with Large Stage (Fig. 119) 073 



Projection-Microscopes (Fig. 120) 673 



Apparatus for Projecting an Image to any required Distance with Variable 



Amplification 677 



Waechter's Travelling Dissecting Microscope (Fig. 121) 077 



Measurement of the Power of Eye-pieces 678 



Hall's Eye-protector for use with the Monocular Microscope 07S 



Cramer's Camera Lucida (also Hofmann's and Oberhduser's) (Figs. 122-125) 679 



Bausch and Lomb Optical Co.'s Fine Adjustment (Figs. 126 and 127) .. GS3 



Nose-piece for Binocular Prisms 0S4 



Homogeneous and Water-immersion Objectives 085 



Collar Correction of Objectives .. 685 



Measuring Thickness of Cover-glass by Correction Collar 687 



Bausch and Lomb Optical Co.'s Glass Stage and Slide-carrier (Fig. 128) .. 087 



I'homas' Vivarium (Fig. 129) GS8 



Bausch and Lomb Optical Co.'s Immersion Illuminator (Figs. 130 and 131) G8S 



Gundlach's Immersion Condenser (Fig. 132) 089 



Symmetrical Hlumination 691 



